newsadmin.aspx.cs

面向.net的WEB应用程序设计-----C#语言

using System;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Web;
using System.Web.SessionState;
using System.Web.UI;
using System.Web.UI.WebControls;
using System.Web.UI.HtmlControls;
using System.Data.SqlClient;
using NewsKindAdmin.Operate_DB;

namespace NewsKindAdmin.Admin
{
	/// <summary>
	/// NewsAdmin 的摘要说明。
	/// </summary>
	public class NewsAdmin : System.Web.UI.Page
	{
		protected System.Web.UI.WebControls.DropDownList DpListnewskind;
		protected System.Web.UI.WebControls.Button btnAdd;
		protected System.Web.UI.WebControls.Label Label1;
		protected System.Web.UI.WebControls.DataGrid DgridNews;
	
		private void Page_Load(object sender, System.EventArgs e)
		{
			// 在此处放置用户代码以初始化页面
			if(!Page.IsPostBack)
			{
				this.NewsKindDataBind();
				if(this.DpListnewskind.SelectedIndex>-1)
				{
					this.NewsDataByKindIdBind(Int32.Parse(this.DpListnewskind.SelectedItem.Value));
				}
			} 
		}

		#region Web 窗体设计器生成的代码
		override protected void OnInit(EventArgs e)
		{
			//
			// CODEGEN: 该调用是 ASP.NET Web 窗体设计器所必需的。
			//
			InitializeComponent();
			base.OnInit(e);
		}
		
		/// <summary>
		/// 设计器支持所需的方法 - 不要使用代码编辑器修改
		/// 此方法的内容。
		/// </summary>
		private void InitializeComponent()
		{    
			this.DpListnewskind.SelectedIndexChanged += new System.EventHandler(this.DropDownList1_SelectedIndexChanged);
			this.btnAdd.Click += new System.EventHandler(this.btnAdd_Click);
			this.DgridNews.SelectedIndexChanged += new System.EventHandler(this.DgridNews_SelectedIndexChanged);
			this.Load += new System.EventHandler(this.Page_Load);

		}
		#endregion

		private void DropDownList1_SelectedIndexChanged(object sender, System.EventArgs e)
		{
				if(this.DpListnewskind.SelectedIndex>-1)
				{
					this.NewsDataByKindIdBind(Int32.Parse(this.DpListnewskind.SelectedItem.Value));
				}
		}
		private void NewsKindDataBind()
		{
			News news=new News();
			SqlDataReader Sdr=news.GetNewsKindData();
			this.DpListnewskind.DataSource=Sdr;
			this.DpListnewskind.DataTextField="NKindName";
			this.DpListnewskind.DataValueField="KId";
			this.DpListnewskind.DataBind();
			Sdr.Close();
		}
		public void NewsDataByKindIdBind(int kid)
		{
			News news=new News();
			SqlDataReader Sdr=news.GetNewsDataByKindId(kid);
			this.DgridNews.DataSource=Sdr;
			this.DgridNews.DataBind();
			Sdr.Close();
		}

		private void DgridNews_SelectedIndexChanged(object sender, System.EventArgs e)
		{

		}

		private void btnAdd_Click(object sender, System.EventArgs e)
		{
			this.Response.Redirect("NewsAdd.aspx?kid="+this.DpListnewskind.SelectedValue);
		}
	}
}